155418028600 has 96 divisors (see below), whose sum is σ = 362787717600. Its totient is φ = 61919884800.

The previous prime is 155418028589. The next prime is 155418028603. The reversal of 155418028600 is 6820814551.

It is a happy number.

It is a super-2 number, since 2×155418028600² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155418028603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69975490 + ... + 69977710.

It is an arithmetic number, because the mean of its divisors is an integer number (3779038725).

Almost surely, 2^155418028600 is an apocalyptic number.

155418028600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155418028600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181393858800).

155418028600 is an abundant number, since it is smaller than the sum of its proper divisors (207369689000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155418028600 is a wasteful number, since it uses less digits than its factorization.

155418028600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3473 (or 3464 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 40.

The spelling of 155418028600 in words is "one hundred fifty-five billion, four hundred eighteen million, twenty-eight thousand, six hundred".